Casting apparatus for the registration of printing plates



Jan. 4, 1938. v|-|. A. w. WOOD ,3

CASTING APPARATUS FOR THE REGISTRATION OF PRINTING PLATES I Original Filed March 5, 1932 2 Sheets-Shet l 'zfi l I I l" I] 1 J1 I; f T111110 1L ,1 M J f IN VEN TOR.

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CASTING APPARATUS FOR THE REGISTRATION OF PRINTING PLATES Original Fiied March 3, 1932 2 Sheets-Sheet 2 INVENTOR 'Zwy 42 611127604, I

ATTORNEY-9 Patented Jan. 4, 1938 CASTING APPARATUS FOR THE REGISTRA- TION OF PRINTING PLATES Henry A. Wise Wood, New York, N. Y., assignor to Wood Newspaper Machinery Corporation, New York, N. Y., a corporation of Virginia Original application March 3, 1932, Serial No.

596,474. Divided and this application September 5, 1935, Serial No. 39,243. Renewed June 8, 1937 2 Claims.

This is a division of my application for patent on Registration of printing plates, filed March 3, 1932, Serial No. 596,474.

The principal objects of this invention are to provide such a registration that little or no care need be exercised by the employee who puts the matrix in the casting box and yet all the plates will be cast with their corresponding printing matter exactly in registration, and to so coordihate the molding of the matrix and the placing of the matrix in the casting box that these operations' will cooperate to produce perfectly registered plates in color printing.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings, in which Fig. 1 is a plan of a chase showing certain features of this invention;

Fig. 2 is an enlarged sectional view on the line 2--2 of Fig. 1;

Fig. 3 is a similar View of a portion of the matrix after it is molded;

Fig. 4 is a plan of a modification coming within the scope of this invention;

Fig. 5 is a sectional View on the line 5--5 of Fig. 4;

Fig. 6 is an end View of a casting box showing in section the method of holding the matrix in position by the use of the holes in the margin of the matrix, and

Fig. 7 is an edge view of the casting box as indicated by the arrow 1 in Fig. 6.

As stated, this invention relates to color printing, especially for newspapers. It has been customary tomake up printing plates Which are to produce colored products, finish them, and register them by means on the printing press that has been more or less crude. Not only is it a tedious task but it consumes considerable time and very often the results are. not entirely satisfactory. With the advent of colored pages in daily newspapers, it has become increasingly important that simple registering means be supplied for insuring that a plurality of plates printing different colors on the same area of paper be properly registered and that that be accomplished with the least possible labor cost and delay in the process. The general trend is away from the electrotype plates and toward stereotypes, speed being an essential in this Work.

This invention deals with the proper registering of each stereotype matrix by the production of registering means in the matrix. Then these registering means are used to locate the matrix both in the trimming device and in the casting box. It is important that each character, when locked in the form, occupy the same position as the one with which it is to register. This invention does not'deal with that particular part of the make-up but deals with the method from that point on to the making of the finished plate.

Referring to the first three figures, the form in which this part of the invention is illustrated is very simple. The chase I0 is provided with locating projections, indentations, or pins H which may be placed at various points wherever it may be necessary on the chase itself or its furniture so that when the matrix is molded, they will leave openings, notches, perforations, or marks on the matrix in definite locations. These holes or the like can be used for locating the matrix in the plate casting device. This is done for the reason that different matrices molded in the same chase are to be used for making different plates which will print on the same page in different colors. They can be placed in the casting box in exact registration with each other so that different colors eventually will be applied to the same page in exactly the proper relationships with each other.

It will be understood, of course, that the plates cast in the casting box will thereafter be registered exactly with respect to each other on the printing cylinder.

These pins I I leave the holes l2 molded in the matrix 13. In Figs. 1, 2 and 3, all these pins are shown as cylindrical or at least round in shape and two of them are shown on each end of the chase and one on each side. Four of the end ones are shown as registering with the side ones but that is not vital. In other words, in the preferred form, six holes l2 are produced in the matrix, some of these holes being unnecessary in the placing of the matrix in the casting box but being used in the trimming of the matrix only.

When a four-color job is being molded by placing each point of the four colors exactly in the same position in the form, molding one matrix for each, these matrices will carry the characters on the page in exactly the same relation to the molded holes l2 in all four cases. In this case six holes l2 are shown.

A modification of the chase construction is shown in Figs. 4 and 5. In this case a different shaped pin I3 is shown having longitudinal bar 14 at the top for molding a slot in the matrix. In cases in which the matrix shrinks slightly and also in cases in which the matrix bar on the stereotype mold does not close properly, the round pin construction might cause trouble. If this oocurs frequently enough it would be advisable to use two of these pins l3 at one end of the chase with two of the round pins II at the other end. This gives accurate register at the end having the round pins and allows for slight variation at the other.

The matrix is trimmed in accordance with my divisional application Serial No. 708,113, filed Jan. 24, 1934, or in any other desired way.

The holes 12 are used to register the matrix in the casting box. This is accomplished in a very simple manner as shown in Figs. 6 and 7 by utilizing the usual toggle motion 25 for sliding the clip 25, guided by inclined slots 21 and headed pins 28 as usual, to clamp and unclamp the mat.

Carried by the bar in both sides of the casting box are slidably operated registering pins 30 or other means for registering with the marks on the matrix. These pins fit in the perforations in the matrix, not only to hold the matrix rigidly but especially to insure that each successive matrix is placed in exactly the same position in the box..

Thus the finished plates as they come out of the box are perfect and will register perfectly.

These registering pins 30 are mounted on slides 3| which are provided with angular slots 32 into which studs 33 project from the clip 26. Thus in ordinary operation the matrix is slipped in between the bar and clips and as the clip'is locked by a motion from right to left and down along a line parallel to slot 21in Fig. '7, the, pins 3% project outwardly and engage the registering holes in the matrix. a larger angle'to the vertical than are slots 21.

It will be obvious therefore that by this invention the accurate registering of successive mat- ,of colors on the same page, is provided for.

Angular slots 32 are made at' rices to be used for the production of plates, which will in turn be used for printing a plurality The man who trims the matrices and the man who puts them in the casting box arejr'eli'eved from the necessity of adjusting them and can bring them to' the proper positions instantly. This greatly reduces the time, energy and labor necessary at present for registering plates after they have gone to the press. The method involved is of a simple nature not adding to the expense of molding the fmatrices or the time required for doing it and 'the" additional apparatus consists'of not much more than the simple pins described.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:

1. In a stereotype plate casting apparatus, the combination of a casting box and core and a clip for holding the matrix, of a pin adapted to be projected through the edge of the matrix for holding the matrix in a definite position therein, and means whereby the movement of the clip to operative position will move the pin automatically to project into the matrix.

2. In a stereotype casting mold,.the combination of a clip, means for moving the clip to locking position to hold the matrix, a pin carried by the clip, a slide having an inclined slot for receiving the pin, and'a matrix holding'pinon saidslide,

whereby when the clip is moved to matrix holding and locking position the second pinwill be projected.

HENRY A. WISE WOOD. 

